/*
 * Copyright 2004-2009 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package susano.presen.threadlocal;

import java.text.SimpleDateFormat;

/**
 * A class to access the current {@link SimpleDateFormat}.
 *
 * @author tanaka.akira.2006
 * @version $Id: DateFormatLocal.java 536 2009-10-21 06:16:42Z tanaka.akira.2006 $
 *
 */
public final class DateFormatLocal {

	private static ThreadLocal<SimpleDateFormat> dateformats = new ThreadLocal<SimpleDateFormat>(){
		@Override
		protected SimpleDateFormat initialValue() {
			return new SimpleDateFormat();
		}
	};

	/**
	 * Returns the {@link SimpleDateFormat} attached to the current thread.
	 *
	 * @param pattern
	 * @return the {@link SimpleDateFormat} attached to the current thread
	 */
	public static SimpleDateFormat get(String pattern) {
		SimpleDateFormat df = dateformats.get();
		df.applyPattern(pattern);
		return df;
	}

	/**
	 * Sets the {@link SimpleDateFormat} to the current thread.
	 *
	 * @param locale
	 *            the {@link SimpleDateFormat}
	 */
	public static void set(SimpleDateFormat dateformat) {
		dateformats.set(dateformat);
	}

	private DateFormatLocal() {
	}
}